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Tag: "observed" at biology news

Mosquito study shows new, faster way West Nile can spread

...efore virus can be detected in the blood) has been observed in cases involving viruses transmitted by ticks, it has never before been documented in a virus carried by mosquitoes. To determine whether West Nile virus could be transmitted non-viremically, the researchers placed an anesthetized, uninfected lab ...

Methamphetamine Abuse, HIV Infection Cause Changes in Brain Structure

...ning, verbal fluency, and motor functioning. They observed that methamphetamine abuse is associated with increases in the volume of the brain’s parietal cortex (which helps people to understand and pay attention to what’s going on around them) and basal ganglia (linked to motor function and motivation). HIV ...

'Gadonanotubes' greatly outperform existing MRI contrast agents

...ed increases in magnetic and MRI effects that they observed in tests at Rice, at the University of Houston's Texas Center for Superconductivity, and in the Swiss laboratories. More than 25 million patients in the U.S. undergo MRIs each year. Doctors use contrast agents in about 30 percent of MRIs. The contra...

Researchers report breakthrough against world’s deadliest viruses

...morrhagic fever symptoms that are similar to those observed in humans infected by these viruses. Demonstrating that these vaccines are safe and effective in monkeys is a promising indicator of their real potential for use in humans. "When you see the tragedies these viruses cause, it's very frustrating that ...

Vibrio bacteria could be a risk to fish as well as humans

...se in oysters. Professor Austin comments: "Having observed this, the question arose about whether any of these new species could have implications to the health of marine animals. The answer was that around half of the new species killed fish in laboratory conditions. Our research shows that marine vibrios c...

Variant prion protein causes infection but no symptoms

...and poor coordination. In contrast, the scientists observed 128 transgenic mice--those engineered to produce prion protein without a glycophosphoinositol (GPI) cell membrane anchor--for 500 to 600 days and saw no signs of scrapie disease. Subsequent electron microscopic examinations at UCSD, however, confirme...

UCLA researchers identify key enzyme linked to childhood blindness

...ld correct the blindness in these children, as was observed in mice and dogs with RPE65 mutations," Travis said. "This is a major breakthrough in understanding the visual cycle. It has ramifications for several inherited blinding diseases caused by mutations in visual cycle genes." The newly identified isome...

Acid water in East Java threatens biodiversity and local welfare

... Lohr sampled the water at various locations. She observed that the neutral river water contained normal aquatic fauna, but that only mosquito larvae could survive the extremely acidic water. The diversity of microorganisms and algae was also very low. The inhibited breakdown of organic material was another ...

New discovery blurs distinction between human cells and those of bacteria

... said. While microcompartments have been directly observed in only a few organisms, "surely there will be many more," Yeates said. "The capacity to create subcellular compartments is very widespread across diverse microbes. We believe that many prokaryotes have the capacity to create subcellular compartments...

MSKCC researchers uncover structure of key protein complex in cells

... researchers believe the protein complex they have observed is assembled at nuclear pore complexes, portals th...esearch is to probe the importance of the contacts observed in our structure with the biochemical activities and effects on the cell itself of disrupting these ...

Nighttime Dying Linked To Sleep Apnea From Brain Cell Loss

... said. While microcompartments have been directly observed in only a few organisms, "surely there will be many more," Yeates said. "The capacity to create subcellular compartments is very widespread across diverse microbes. We believe that many prokaryotes have the capacity to create subcellular compartments...

Field tested: Grasslands won't help buffer climate change as carbon dioxide levels rise

... said. While microcompartments have been directly observed in only a few organisms, "surely there will be many more," Yeates said. "The capacity to create subcellular compartments is very widespread across diverse microbes. We believe that many prokaryotes have the capacity to create subcellular compartments...

Old drug shows new promise for Huntington's Disease

...ey also seemed to make less of the toxic protein," observed Massa, who is also a clinical assistant professor of neurology at the University of California, San Francisco (UCSF). Based on the in vitro results, Massa decided to test the drug in vivo, on mice bred to express the toxic huntingtin protein. The m...

Scientists get first glimpse at how plants, most animals repair UV-damaged DNA

For the first time, researchers have observed exactly how some cells are able to repair DNA damage caused by the sun's ultraviolet (UV) radiation. The Ohio State University study revealed how the enzyme photolyase uses energy from visible light to repair UV damage. This enzyme is missing in al...

Purdue's gold nanorods brighten future for medical imaging

...er being injected, the nanorods could no longer be observed in the animals' blood, presumably because the rods had been filtered out of the blood by the kidneys. "To be able to detect cells at an early stage of disease such as cancer, it is important to have a reliable technique that has sensitivity at the s...

Biologist Discovers What May Be World’s ‘Pickiest?Mates

...ate. “As far as I know, no other species has been observed sampling nearly as many candidates as the California fiddler crab,?said Catherine deRivera, who conducted the study while a doctoral student and a lecturer at UCSD. She is now a research biologist at the Aquatic Bioinvasions Research and Policy Insti...

Gene that helps mosquitoes fight off malaria parasite identified

...es through a process called RNA interference. They observed that the number of parasites that developed in Anopheles stephensi mosquitoes increased three-fold when the gene was knocked out. In Anopheles gambiae mosquitoes, removing the SPRN6 gene delayed the process of parasite lysis, whereby the mosquito rid...

PLoS Medicine publishes first trial of effect of male circumcision on HIV infection

.... The large protective effect of male circumcision observed has surprised many HIV experts, and it will be important to see whether the related studies under way confirm the results of this trial. The trial, conducted by a team of French and South African researchers and sponsored by ANRS (the French Natio...

Plants reveal a secret and bring researchers nearer a cleaner future

...en carefully analysing the reaction kinetics, they observed a time delay before the O2-evolving step. This delay unambiguously proved the existence of the long-searched for intermediate state. How far away are we then from using the sun to power our daily lives? Michael Haumann, the main author of the publi...

Protein behind autumn color splendor identified

...proteins are the only ones whose activities can be observed from space. Working with the model plant mouse-ear cress (Arabidopsis thaliana), a research team at Umea Plant Science Center (UPSC), in association with a Polish scientist, has identified a protease that degrades LHCII. The researchers assumed th...

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